Safety precautions147Never place batteries inside or near devices that generate heat, such•as microwave ovens, stoves, or radiators. Batteries may explode whenoverheated.Never crush or puncture the battery. Avoid exposing the battery to high•external pressure, which can lead to an internal short circuit and overheating.Protect the device, batteries, and chargers from damageAvoid exposing your device and batteries to very cold or very hot•temperatures.Extreme temperatures can cause the deformation of the device and reduce•the charging capacity and life of your device and batteries.Prevent batteries from contacting metal objects, as this can create a•connection between the + and – terminals of your batteries and lead totemporary or permanent battery damage.Never use a damaged charger or battery.•Caution: Follow all safety warnings andregulations when using your device in restrictedareasTurn off your device where prohibitedComply with all regulations that restrict the use of a mobile device in aparticular area.Do not use your device near other electronic devicesMost electronic devices use radio frequency signals. Your device may interferewith other electronic devices.Do not use your device near a pacemakerAvoid using your device within a 15 cm range of a pacemaker if possible, as•your device can interfere with the pacemaker.If you must use your device, keep at least 15 cm away from the pacemaker.•To minimize the possible interference with a pacemaker, use your device on•the opposite side of your body from the pacemaker.Do not use your device in a hospital or near medical equipmentthat can be interfered with by radio frequencyIf you personally use any medical equipment, contact the manufacturer of theequipment to ensure the safety of your equipment from radio frequency.